Precision finished BK7, Fused Silica and Sapphire windows available in custom sizes and machined shapes. Fine tune your reflection and transmission performance requirements with an ultra-durable low loss multi-layer thin film coating. Using high energy deposition techniques, we offer low stress, conductive (ITO), high reflection and enhanced metal mirrors as well as low absorption antireflection coatings. Our advanced metrology and testing laboratory measures performance characteristics for each optic including finish, wavefront, reflection, transmission, vacuum/leak detection, defect mapping and surface quality. From initial samples for development to low-volume production, we offer solutions for your specialized needs.

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UHV Viewports using Fused Silica, Sapphire, Zinc Selenide and numerous other optics

MPF Products, Inc. specializes in designing and manufacturing UHV Viewports for scientific & harsh environment applications that require excellent atomic level hermeticity. MPF designs use UV and EUV grade Sapphire and Fused Silica to various metals.

MPF has over 175 standard designs on our website, while our engineering team has produced hundreds of specialty viewport designs over the last twenty years. Our extensive inventory levels of titanium and 316LN materials can easily translate into truly non-magnetic windows for your demanding environment.

Our Anti-Reflective (AR) and Indium-Tin-Oxide (ITO) Coated viewports have shipped globally for use in Laser Applications including KrF, XeCl, ND-YAG and Helium Neon lasers. We have also partnered with our customers to construct viewports for Differentially Pumped, Wedged, Brewster Angled, Large Viewing, Re-Entrant, Water-Cooled, Over Pressure and NIR/IR applications.

MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures. View our Main Transmission Charts.

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Coatings and Applications (44)

We offer a large selection of coatings and applications for our UHV viewports. Our methods include Evaporation, E-Beam, Ion Assist, and High Energy Plasma. Anti-Reflective, Indium Tin Oxide (ITO), Broadband (BBAR), V-Coat, Dual AR, Multi-Band AR, and Reflective Coatings can all be processed on any of the viewport offerings. Please call or e-mail us to discuss your specific application with one of our sales representatives. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Standard/Stocked AR Coating Options for Viewports https://youtu.be/YrYouDXAP8E
Crystal Quartz (SiO2) (4)

Crystal Quartz (SiO2) is typically used as an optical window in the 3-5 micron region but can also be used as an optical filter. Crystal Quartz (SiO2) has a low density and a high thermal conductivity, making it an ideal material to be used for laser mirrors. Silicon is grown by two different forms. One, is Czochralski (CZ), which contains some oxygen typically leading to an absorption band. The other is Optical Quality Silicon. This form is typically doped, and because it has a high refractive index, it must be anti-reflective coated to achieve a high optical transmission. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates, or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute - Crystal Quartz (SiO2) Transmission Chart https://youtu.be/YrYouDXAP8E
Non-Magnetic (33)

MPF Products Inc. offers a large variety of non-magnetic viewports. We categorized these viewports based on their magnetic permeability. From 316LN to Titanium, MPF Products Inc. has what you need for your next application. Additionally, MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. Due to this, you may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute https://youtu.be/YrYouDXAP8E
Re-Entrant (7)

MPF Products Inc. produces UHV Re-Entrant Viewports. These specific viewports are perfect for allowing you to introduce cameras or other customer specific tools into the vacuum chamber. MPF can customize our UHV Re-Entrant Viewports to be customer specific in regards to length, size, window material, mounting material and specified coatings wavelengths when needed. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute https://youtu.be/YrYouDXAP8E
Sapphire (33)

The properties of Sapphire makes this material ideal for use in harsh environments. It has a unique combination of excellent physical, chemical and optical properties that allow it to retain its composition at elevated temperatures. This material will resist attack from acids and alkali up to 1000°C as well as Hydrofluoric Acid below 300°C. This material is inherently birefringent and has a transmission range from UV to NIR. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute - UV Sapphire Transmission Chart - DUV Sapphire Transmission Chart https://youtu.be/YrYouDXAP8E
Calcium Fluoride (CaF2) (8)
Fused Silica (78)

Fused Silica is glass consisting of silica in amorphous (non-crystalline) form. It differs from normal glasses in that it contains no other materials, which are added to glass to lower the melt temperature. This material is non-birefringent and has high working and melting temperatures. It is widely used in the semiconductor sector as well as laboratory equipment. It transmits UV better than other glasses. The low Coefficient of Thermal Expansion (CTE) of this material makes it a useful material for precision mirror substrates. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute - UV Fused Silica Transmission Chart - DUV Fused Silica Transmission Chart - EUV Fused Silica Transmission Chart https://youtu.be/YrYouDXAP8E
Germanium (Ge) (2)
Magnesium Fluoride (MgF2) (7)
Over Pressure Sapphire Viewports (3)
RF Viewports (3)
Zinc Selenide (ZnSe) (13)